Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/ui/env-null-vars.rs b/src/test/ui/env-null-vars.rs
new file mode 100644
index 000000000..10582a8a5
--- /dev/null
+++ b/src/test/ui/env-null-vars.rs
@@ -0,0 +1,23 @@
+// run-pass
+
+#![allow(unused_imports)]
+
+// ignore-windows
+// ignore-wasm32-bare no libc to test ffi with
+
+// issue-53200
+
+#![feature(rustc_private)]
+extern crate libc;
+
+use std::env;
+
+// FIXME: more platforms?
+#[cfg(target_os = "linux")]
+fn main() {
+    unsafe { libc::clearenv(); }
+    assert_eq!(env::vars().count(), 0);
+}
+
+#[cfg(not(target_os = "linux"))]
+fn main() {}